THE EFFECT OF ADDITION GREEN INHIBITOR D-GALACTOSE ON CORROSION RATE OF ALUMINUM ALLOY 5052 IN SULFURIC ACID (H2SO4) MEDIA

Aluminum alloy 5052 (Al 5052) is one of the metals used as a bipolar plate in Proton Exchange Membrane Fuel Cell (PEMFC) due to has its light mass and being easy form, and, high conductivity resistivity properties. This material prone corrosion current knowledge protect surface currently lacking. The product PEMFC produces electrical energy, hot steam (313 – 353 K), water. These conditions have an impact on degraded caused by acidic nafion membrane. increases risk cathode side plate. Coating with green inhibitor using electrophoretic deposition technique (EPD) way deal that occurs. analysis method electrochemical potentiodynamic polarization techniques, electrochemistry impedance spectroscopy (EIS), Fourier-transform infrared (FTIR) scanning electron microscopy (SEM). In this study, D-galactose was concentration 0.5 1.5 g an, EPD time 15 45 minutes M sulfuric acid (H2SO4) media pH 1-4. Potentiodynamic at lowest value (Icorr) demonstrates (the minutes) resulted rate Al5052 before 0.0075 mmPY while after 0.0041 (inhibitors efficiency 45.2%). FTIR spectrum, broad peak appeared range 3000-3600 cm-1, which refers formation hydrogen bonding hydroxyl group. Methyl group also appear 2918 cm-1 2850 attributed =CH2 asymmetric stretch −CH3 symmetric stretch, respectively. Carbonyl 1500 1700 represent C=O bond amide, aldehyde. Peak 1097 1035 C-O were connected secondary primary alcohols. resistance for are 1.2 kΩ/cm2 2.2 kΩ/cm2, Here we find increasing EPD. results cross section within average 29.8 μm, morphology SEM showed pitting corrosion. On other hand, image coating gr shows smooth visible black lumps, suggesting successfully reduced D-galactose. Our simple robust inferred protection route towards viable physically stable inhibitors.